National Institute for Materials Science

Samsung Electronics Co., Ltd.

Ishihara Sangyo Kaisha, Ltd.

National Institute for Research in Inorganic Materials

Independent Administrative Institution National Institute for Materials Science

Yasuo Ebina

Takayoshi Sasaki

Minoru Osada

Chan Kwak

Hyungjun Kim

Changsoo Lee

Giyoung Jo

Mamoru Watanabe

Nobuo Iyi

Hirofumi Taniguchi

Yusuke Uesusuki

Kazuko Saruwatari

Kazuaki Matsuba

Kousyo Akatsuka

Dohwon Jung

Takaaki Taniguchi

Provided are a dielectric material, a device including the dielectric material, and a method of preparing the dielectric material, in which the dielectric material may include: a layered perovskite compound, wherein the layered perovskite compound may include at least one selected from a Dion-Jacobson phase, an Aurivillius phase, and a Ruddlesden-Popper phase, a temperature coefficient of capacitance (TCC) of a capacitance at 200° C. with respect to a capacitance at 40° C. may be in a range of about −15 percent (%) to about 15%, and a permittivity of the dielectric material may be 200 or greater in a range of about 1 kilohertz (kHz) to about 1 megahertz (MHz).

Dielectric material, device comprising dielectric material, and method of preparing dielectric material

Provided is a water-swelling layered double hydroxide characterized by having an organic sulfonic acid anion (A) between layers, and by being represented by the below mentioned general formula (1): QR(OH)(A)(X).mHO . . . (1). Here, Q is a divalent metal, R is a trivalent metal, Ais an organic sulfonic acid anion, m is a real number greater than 0, and z is in the range of 1.8&#x2266;z&#x2266;4.2. Xis the n-valent anion remaining without Asubstitution, n is 1 or 2, y represents the remaining portion of X, and 0&#x2266;y&#x3c;0.4.

Water-swelling layered double hydroxide, method for producing same, gel or sol substance, double hydroxide nanosheet, and method for producing same

Disclosed is an organic dispersion comprising a flaky titanium oxide particle having a high crystallinity and high light permeability contained in an organic solvent. The dispersion can be prepared by a method comprising preparing an aqueous dispersion of a flaky titanium oxide particle containing an organic cation, centrifuging the aqueous dispersion to produce a precipitate, and adding the precipitate to an organic solvent, or a method comprising lyophilizing the aqueous dispersion to produce a lyophilized material and mixing the lyophilized material to an organic solvent. When the organic dispersion is used, it becomes possible to form a film comprising a monolayer of a titanium oxide nanosheet densely arranged therein by such a simple manner that the dispersion is coated on a base material and drying the dispersion. The film thus produced has a photocatalytic activity and a super-hydrophilic property.

Organic solvent dispersion containing flaky titanium oxide, method for production of the dispersion, titanium oxide film using the dispersion, and method for production of the titanium oxide film

A high dielectric nanosheet laminate is produced by laminating nanosheets, each of which has a thickness of 10 nm or less and is formed of an oxide that has a perovskite structure wherein at least four NbOoctahedrons, TaOoctahedrons or TiOoctahedrons are included in a unit lattice. Consequently, the high dielectric nanosheet laminate is capable of achieving a high dielectric constant and a satisfactory insulation property, which are preferable for high dielectric nanosheet multilayer capacitors or the like, at the same time even if formed very thin.

High dielectric nanosheet laminate, high dielectric element and method for producing the same

To provide a method for producing a thin film consisting of nanosheet monolayer film(s) and use of the thin film obtained thereby. The method for producing a thin film consisting of nanosheet monolayer film(s) by a spin coat method according to the invention comprises a step for preparing an organic solvent sol formed by allowing nanosheets obtained by the exfoliation of an inorganic layered compound to be dispersed in an organic solvent; and a step for dropping the organic solvent sol onto a substrate and rotating the substrate using a spin coater. Preferably, the nanosheet size, the organic solvent sol concentration and the spin coater rotation speed are controlled.

Methods for producing a thin film consisting of nanosheet monolayer film(s) by spin coat methods, and hyperhydrophilized materials, substrates for an oxide thin film and dielectric materials obtained therefrom

Provided is a dielectric element comprising a dielectric thin film formed of a layer of perovskite nanosheets. The dielectric element has the advantages of inherent properties and high-level texture and structure controllability of the perovskite nanosheets, therefore realizing both a high dielectric constant and good insulating properties in a nano-region.

Dielectric element and method for producing the dielectric element

A multilayer ultrathin film which comprises layers of a polymer and layers of lamina particles alternately assembled, said lamina particles are obtained by exfoliating microcrystals of a layered titanium oxide.

Titania ultrathin film and method for producing it

Growing community of inventors

Ibaraki, Japan

Yasuo Ebina